U.S. patent application number 14/782948 was filed with the patent office on 2016-02-25 for refrigeration device comprising an evaporator.
The applicant listed for this patent is BSH HAUSGERATE GMBH. Invention is credited to REINHARD MEHNER, DANIEL MICKO, HOLGER MOCH, BERND SCHLOEGEL, ANDREAS VOGL.
Application Number | 20160054037 14/782948 |
Document ID | / |
Family ID | 50434200 |
Filed Date | 2016-02-25 |
United States Patent
Application |
20160054037 |
Kind Code |
A1 |
MEHNER; REINHARD ; et
al. |
February 25, 2016 |
Refrigeration Device Comprising an Evaporator
Abstract
A refrigeration device has an evaporator for evaporating a
refrigerant. The evaporator includes an inlet pipe for the
admission of the refrigerant, in which inlet pipe there is formed a
pipe region, which has a first flow cross section, and a
constriction region, which has a second flow cross section that is
smaller than the first flow cross section. A method is also
described for producing such an evaporator.
Inventors: |
MEHNER; REINHARD; (DOEBELN,
DE) ; MICKO; DANIEL; (ULM, DE) ; MOCH;
HOLGER; (GIENGEN, DE) ; SCHLOEGEL; BERND;
(GERSTETTEN, DE) ; VOGL; ANDREAS; (HAUNSHEIM,
DE) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
BSH HAUSGERATE GMBH |
Munchen |
|
DE |
|
|
Family ID: |
50434200 |
Appl. No.: |
14/782948 |
Filed: |
April 3, 2014 |
PCT Filed: |
April 3, 2014 |
PCT NO: |
PCT/EP2014/056691 |
371 Date: |
October 7, 2015 |
Current U.S.
Class: |
62/524 ;
29/890.035 |
Current CPC
Class: |
F28F 9/026 20130101;
F25B 39/02 20130101; F25B 39/00 20130101; B23P 15/26 20130101; F28F
2265/28 20130101; F25B 2500/18 20130101; F28D 2021/0064 20130101;
F25B 2500/12 20130101 |
International
Class: |
F25B 39/00 20060101
F25B039/00; B23P 15/26 20060101 B23P015/26 |
Foreign Application Data
Date |
Code |
Application Number |
Apr 9, 2013 |
DE |
10 2013 206 203.6 |
Claims
1-15. (canceled)
16. A refrigeration appliance, comprising: an evaporator for
evaporating a refrigerant, said evaporator including an inlet pipe
for admitting the refrigerant; said inlet pipe having a pipe wall
and having a pipe region formed with a first flow cross section and
a constriction region formed with a second flow cross section
smaller than said first flow cross section; and said constriction
region being formed by a plurality of concave inward curvatures of
said pipe wall of said inlet pipe.
17. The refrigeration appliance according to claim 16, wherein said
constriction region forms a chamber in said inlet pipe.
18. The refrigeration appliance according to claim 16, wherein said
constriction region is one of a plurality of constriction regions
formed in said inlet pipe.
19. The refrigeration appliance according to claim 18, wherein said
pipe region is arranged between two said constriction regions, said
pipe region having a constant, first flow cross section over a
predetermined length.
20. The refrigeration appliance according to claim 16, wherein said
constriction region has a cross-section selected from the group
consisting of a circular cross-section, a rectangular cross-section
and a star-shaped cross section.
21. The refrigeration appliance according to claim 16, wherein said
inlet pipe comprises a conical connecting region for a capillary
tube.
22. The refrigeration appliance according to claim 21, wherein said
constriction region is arranged directly following said
connecting.
23. The refrigeration appliance according to claim 16, wherein said
constriction region is arranged at a distance of less than 50 mm
following one end of a capillary tube.
24. The refrigeration appliance according to claim 16, wherein a
ratio of said first flow cross section to said second flow cross
section is greater than 5:1.
25. A method for producing an evaporator for a refrigeration
appliance, the evaporator having an inlet pipe for admitting a
refrigerant, the method comprising the following steps: providing
an inlet pipe with a first flow cross section; inserting a mandrel,
which predetermines a profile of a second flow cross section, into
the inlet pipe; compressing the inlet pipe to the second flow cross
section as predetermined by the mandrel, in order to produce a
constriction region in the inlet pipe; and removing the mandrel
from the inlet pipe.
26. The method according to claim 25, wherein the step of
compressing the inlet pipe comprises using a forming insert of a
tool that can be displaced radially in relation to a center of the
inlet pipe.
27. The method according to claim 26, which comprises forming
concave inward curvatures in a pipe wall of the inlet pipe by a
shaping segment of the forming insert during the compressing
step.
28. The method according to claim 27, wherein the shaping segment
is a roller rotatably supported on the forming insert.
29. The method according to claim 26, wherein the compressing step
comprises simultaneously producing a plurality of concave inward
curvatures by a plurality of shaping segments of the forming
insert.
Description
[0001] The present invention relates to a refrigeration appliance
having an evaporator.
[0002] At the point where refrigerant is injected into an
evaporator of a refrigeration appliance refrigerant is injected by
a throttle device into an inlet pipe of the evaporator, said inlet
pipe having a much larger internal diameter than at the opening of
the throttle device. As a result the flow of refrigerant produces
noise.
[0003] It is the object of the invention to specify a refrigeration
appliance, in which the noise that is produced when a refrigerant
is injected into an evaporator is reduced.
[0004] This object is achieved by subject matter with the features
set out in the independent claims. Advantageous embodiments of the
invention are the subject matter of the figures, the description
and the dependent claims.
[0005] According to one aspect of the invention the object is
achieved by a refrigeration appliance having an evaporator for
evaporating a refrigerant, wherein the evaporator comprises an
inlet pipe for admitting the refrigerant, in which inlet pipe a
pipe region is formed with a first flow cross section and a
constriction region is formed with a second flow cross section,
which is smaller than the first flow cross section. This has the
technical advantage for example that the flow noise at the point of
injection from the throttle device into the evaporator is reduced.
This changes the geometry of the evaporator to produce improved
noise characteristics due to the change of flow.
[0006] A refrigeration appliance refers in particular to a domestic
refrigeration appliance, in other words a refrigeration appliance
used for domestic management in a domestic situation or in the
catering sector, serving in particular to store food and/or
beverages at defined temperatures, for example a refrigerator, a
freezer cabinet, a combined refrigerator/freezer, a chest freezer
or a wine chiller cabinet.
[0007] In one advantageous embodiment of the refrigeration
appliance the constriction region is formed by at least one concave
inward curvature of a pipe wall of the inlet pipe. This has the
technical advantage for example that the rigidity and bending
moment of the inlet pipe are maintained by the concave inward
curvature.
[0008] In a further advantageous embodiment of the refrigeration
appliance the inlet pipe has a circular cross section. This has the
technical advantage for example that the inlet pipe can be produced
with little material outlay and a large flow cross section.
[0009] In a further advantageous embodiment of the refrigeration
appliance the constriction region forms a chamber in the inlet
pipe. This has the technical advantage for example that the chamber
forms a buffer space for the inflowing refrigerant and the
resulting noise is further reduced.
[0010] In a further advantageous embodiment of the refrigeration
appliance the inlet pipe comprises a number of constriction
regions. This has the technical advantage for example that the
resulting noise is even further reduced.
[0011] In a further advantageous embodiment of the refrigeration
appliance a pipe region is arranged between two constriction
regions, said pipe region having a constant, first flow cross
section over a predetermined length. This has the technical
advantage for example that the flow is stabilized along the length
with the constant flow cross section.
[0012] In a further advantageous embodiment of the refrigeration
appliance the constriction region has a circular, rectangular or
star-shaped cross section. This has the technical advantage for
example that the constriction region with reduced flow cross
section can be produced in a simple manner.
[0013] In a further advantageous embodiment of the refrigeration
appliance the inlet pipe comprises a conical connecting region for
a capillary tube. This has the technical advantage for example that
the noise characteristics of the evaporator are improved even
further.
[0014] In a further advantageous embodiment of the refrigeration
appliance the constriction region is arranged directly after the
connecting region. This has the technical advantage for example
that
[0015] In a further advantageous embodiment of the refrigeration
appliance the constriction region is arranged at a distance of less
than 50 mm after one end of a capillary tube. This also has the
technical advantage for example that the noise characteristics are
improved even further.
[0016] In a further advantageous embodiment of the refrigeration
appliance the ratio of the first flow cross section to the second
flow cross section is greater than 5:1. This has the technical
advantage for example that flow conditions that produce
particularly little noise are achieved in the interior of the
evaporator.
[0017] According to a second aspect of the invention the object is
achieved by a method for producing an evaporator for a
refrigeration appliance, comprising an inlet pipe for admitting a
refrigerant, with the steps of inserting a mandrel, which
predetermines the profile of a second flow cross section, into the
inlet pipe with a first flow cross section; compressing the inlet
pipe to the second flow cross section predetermined by the mandrel,
in order to produce a constriction region; and removing the mandrel
from the inlet pipe. This has the technical advantage for example
that the evaporator can be produced in a particularly simple
manner.
[0018] If support were not provided by the mandrel within the inlet
pipe, there would be a risk of the inlet pipe closing up completely
during shaping. It would also not be possible then to comply with
predetermined manufacturing tolerances. With the aid of the mandrel
it is possible to produce the cross sectional area in the
constriction region reliably in the required tolerance range. With
a long mandrel it is also possible to introduce a number of shapes
one after the other over a longer pipe length.
[0019] In one advantageous embodiment of the method the compression
of the inlet pipe is performed using a forming insert of a tool
that can be displaced radially in relation to the center of the
inlet pipe. This has the technical advantage for example that the
constriction region of the inlet pipe can be formed in a
technically simple manner.
[0020] In a further advantageous embodiment of the method a concave
inward curvature is produced in a pipe wall of the inlet pipe by a
shaping segment of the forming insert during compression. This has
the technical advantage for example that the rigidity and bending
moment of the inlet pipe are maintained by the concave inward
curvature.
[0021] In a further advantageous embodiment of the method the
shaping segment is formed by a roller, which is supported in a
rotatable manner on the forming insert. This has the technical
advantage for example that the pipe surface of the inlet pipe is
not damaged or impaired.
[0022] In a further advantageous embodiment of the method a number
of concave inward curvatures are produced simultaneously by a
number of shaping segments of the forming insert during
compression. This has the technical advantage for example that a
number of constriction regions can be produced by a single work
step.
[0023] In a further advantageous embodiment of the method the
mandrel has a round cross section. This has the technical advantage
for example that constriction regions with a round cross section,
on which the refrigerant does not eddy or become subject to
turbulence, can be produced in a particularly simple manner.
[0024] In a further advantageous embodiment of the method the
mandrel has a diameter of 1 mm to 2 mm. This has the technical
advantage for example that the constriction region can be produced
with a dimension that is particularly low-noise.
[0025] In a further advantageous embodiment of the method the
compression of the inlet pipe takes place using rounded jaw
elements, which are pressed perpendicular to the longitudinal axis
of the inlet pipe. This has the technical advantage for example
that the constriction region can be formed quickly and without
kinks.
[0026] In a further advantageous embodiment of the method the jaw
elements comprise a semi-circular cutout for compressing the inlet
pipe. This has the technical advantage for example that the inlet
pipe of the evaporator is formed in the constriction region by the
jaw elements to correspond to the inserted mandrel.
[0027] Exemplary embodiments of the invention are illustrated in
the drawings and described in more detail in the following.
[0028] In the drawings:
[0029] FIG. 1 shows a schematic view of a refrigeration
appliance;
[0030] FIG. 2 shows a schematic view of an evaporator with a first
embodiment of an inlet pipe;
[0031] FIG. 3 shows a schematic view of a further embodiment of the
inlet pipe;
[0032] FIG. 4 shows a connecting region of the inlet pipe;
[0033] FIG. 5 shows different embodiments of a number of
constriction regions;
[0034] FIG. 6 shows different embodiments of a number of
constriction regions;
[0035] FIG. 7 shows diagrams of the noise resulting from the
evaporator with and without constriction region;
[0036] FIG. 8A shows a method for producing the evaporator for the
refrigeration appliance;
[0037] FIG. 8B shows a cross sectional view of a constriction
region; and
[0038] FIG. 9 shows the inlet pipe after the shaping process;
[0039] FIG. 10 shows a cross sectional view of a further
constriction region;
[0040] FIG. 11 shows a tool for producing the inlet pipe with the
constriction region;
[0041] FIG. 12 shows a cross sectional view of the tool for
producing the inlet pipe;
[0042] FIG. 13 shows a shaping segment of the tool;
[0043] FIG. 14 shows a forming insert of the tool; and
[0044] FIG. 15 shows views of an inlet pipe produced using the
tool.
[0045] FIG. 1 shows a refrigeration appliance 100 in the form of a
refrigerator, with an upper refrigerator door and a lower
refrigerator door. The refrigerator serves for example to chill
food and comprises a refrigerant circuit with an evaporator, a
compressor, a condenser and a throttle device. The evaporator is a
heat exchanger, in which after expansion the liquid refrigerant is
evaporated by the absorption of heat from the medium to be cooled,
in other words the air in the interior of the refrigerator.
[0046] The compressor is a mechanically operated component, which
takes in refrigerant vapor from the evaporator and ejects it at a
higher pressure to the condenser. The condenser is a heat
exchanger, in which after compression the evaporated refrigerant is
condensed by the emission of heat to an external cooling medium, in
other words the ambient air. The throttle device is an apparatus
for constantly reducing pressure by cross section constriction.
[0047] The refrigerant is a fluid, which is used to transfer heat
in the cold-generating system, absorbing heat when the fluid is at
low temperatures and low pressure and emitting heat when the fluid
is at higher temperature and higher pressure, with changes of state
of the fluid generally being included.
[0048] FIG. 2 shows a schematic view of an evaporator 103 with a
first embodiment of an inlet pipe 105. At the injection point the
refrigerant is injected by the throttle device or capillary tube
113 into an inlet pipe 105 with a much larger internal diameter
than at the opening of the capillary tube 113. This produces flow
noise.
[0049] The evaporator 103 therefore comprises a pipe region 107
with a first flow cross section and a constriction region 109 with
a second flow cross section, which is smaller than the first flow
cross section. The constriction region 109 changes the geometry of
the evaporator in order to change the flow of the refrigerant in
such a manner that improved noise characteristics result. To this
end the internal cross section of the evaporator 103 is reduced
once or a number of times so that one or more chambers 111 are
formed. The constriction regions 109 here can be arranged in such a
manner that the dimensions of the chambers, for example length,
width or volume, differ.
[0050] The principle of reducing admission noise consists of
reducing the flow cross section in the inlet pipe 105 at the
transition from the pipe region 107 to the constriction region 109
and subsequent enlarging of the flow cross section at the
transition from the constriction region 109 to the pipe region 107.
The ratio of the flow cross section in the pipe region 107 to the
flow cross section in the constriction region 109 is for example
greater than 5:1. Generally this ratio can be different in each of
the constriction regions 109.
[0051] The inlet pipe 105 has four different cross sectional areas.
At the admission point of the refrigerant at the capillary tube 113
the cross sectional area is Q1. At the point where the capillary
tube 113 ends the cross sectional area of the inlet pipe is Q2. In
the constriction region 109 the reduced cross sectional area is Q3.
In the adjoining inlet pipe 105 the cross sectional area is Q4. The
cross sectional area Q4 can be different from the cross sectional
area Q2 here.
[0052] Between the cross sectional area Q1 and cross sectional area
Q2 the cross sectional area increases from the cross sectional area
of the capillary tube 113 up to the inlet pipe 105. Between the
cross sectional area Q2 and cross sectional area Q3 the cross
sectional area decreases from the cross sectional area of the inlet
pipe 105, at which the capillary tube 113 ends, toward the cross
sectional area of the constriction region 109 (in proximity to the
end of the capillary tube 113, in proximity to the end of the
evaporator pipe). Between the cross sectional area Q3 and cross
sectional area Q4 the cross sectional area of the constriction
region 109 increases toward the inlet pipe 105.
[0053] The constriction region 109 is arranged in proximity to the
end of the capillary tube 113. For example the constriction region
109 is at a distance of less than 50 mm behind the capillary tube
113. The constriction region 109 preferably lies at a distance of
10 mm behind the capillary tube 113. A short distance between the
capillary tube 113 and the constriction region 109 is particularly
favorable for noise characteristics.
[0054] FIG. 3 shows a schematic cross sectional view of a further
embodiment of the inlet pipe 103. In this embodiment the inlet pipe
103 comprises three constriction regions 109, so that three
chambers 111 are formed, into which the refrigerant flows. The
chambers have a pipe region 109, which has a constant flow cross
section over a predetermined length x1. This embodiment improves
the noise characteristics still further. The shape and dimensions
of the constriction regions 109 in the inlet pipe 105 can generally
be different from one another. Also the distances between
constriction regions 109 can be different. The constriction regions
109 can have a rectangular cross section, produced by compressing
the sides of the inlet pipe 105. This reduces a high sound pressure
level when the refrigerant is being injected in.
[0055] FIG. 4 shows a connecting region of the inlet pipe 105 for a
capillary tube 113. The admission point for the refrigerant at the
connecting region forms the transition between the high-pressure
segment and the low-pressure segment of the refrigerant circuit.
There is a sudden change in the flow cross section from the
capillary tube 113 to the larger inlet pipe 105 of the evaporator
103 at this point. The spreading out of the refrigerant at this
point is accompanied by admission noise. In order to improve the
noise characteristics further, the cross section of the connecting
region of the inlet pipe 105 is increasingly enlarged.
[0056] The inlet pipe 105 widens conically or in a stepped manner
for example in the connecting region. The cross section of the
inlet pipe 105 is therefore enlarged slowly after injection of the
refrigerant until the actual flow cross section of the inlet pipe
105 is reached. This further reduces flow noise at the injection
point from the throttle device or capillary tube into the
evaporator.
[0057] FIG. 5 shows a number of constriction regions 109. A
rectangular cross section is shown in part a). A circular cross
section is shown in part b). A star-shaped cross section with three
points is shown in part c). A rectangular cross section with four
corners is shown in part d). A throttle unit for insertion into the
inlet pipe 105, which comprises the constriction region 109, is
shown in part e).
[0058] FIG. 6 again shows different embodiments of a number of
constriction regions 109. The flow cross section of the
constriction region 109 can be configured differently. For example
the flow cross section can have a rectangular, circular or
star-shaped form.
[0059] FIG. 7 shows diagrams of the noise resulting from the
evaporator 103 with and without constriction region. The diagram A)
shows the noise resulting from the evaporator 103 during admission
of the refrigerant, when there is no constriction region 109 formed
in the inlet pipe 105. When the refrigerant is admitted a noise
then results as shown by an ellipse in the diagram.
[0060] When at least one constriction region 109 is formed in the
inlet pipe 105, reducing the flow cross section compared with the
remainder of the inlet pipe 105, the noise during admission of the
refrigerant into the evaporator 103 decreases. The constriction
region 109 reduces the characteristic injection noise to a minimum.
This is shown in diagram B).
[0061] FIG. 8A shows a method for producing the evaporator 103 for
the refrigeration appliance 100. To this end it shows a plan view
and side view of the inlet pipe 105 with the mandrel 200 inserted.
In a first step a mandrel 200, the external dimensions of which
define the shape of the constriction region 109, is inserted into
the inlet pipe 105. In a second step the inlet pipe 105 is
compressed along the mandrel 200 to the flow cross section
predetermined by the mandrel 200 to produce the constriction region
109. In a third step the mandrel 200 is removed from the inlet pipe
105.
[0062] FIG. 8B shows a cross sectional view of the constriction
region 109 with the mandrel 200 inserted. The mandrel 200 can be
circular in cross section, so that a round flow cross section is
shaped in the constriction region 109. Compression takes place for
example using shaped jaw elements 203 acting on the round mandrel
200, these having a semicircular cutout 205. This produces lateral
areas 115 to the left and right of the constriction region 109,
providing additional stability for the constriction region 109. A
round cross section results, with a diameter of 1.7 mm for example.
A bead is also produced, which increases the strength of the
constriction region 109 so there is no need for an additional
stiffening part.
[0063] However mandrels with other shapes can also generally be
used, producing other flow cross sections in the constriction
region. For example a mandrel 200 with a rectangular or square
profile can be used, producing a rectangular or square flow cross
section, of for example 7 mm.times.0.3 mm. Rounded, straight jaw
elements can then be used for shaping, being pressed perpendicular
to the pipe axis. The inlet pipe 105 can be bent and kinked very
easily in the region of the shaping.
[0064] FIG. 9 shows the inlet pipe 105 after the shaping process.
Formed in the center of the inlet pipe 105 are one or more
constriction regions 109, which comprise the lateral areas 115.
[0065] The evaporator 103 causes injection noise in the
refrigeration appliance to be reduced. The evaporator 103 can be
produced in a simple manner. The number of constriction regions 109
and their form are variable.
[0066] FIG. 10 shows a cross sectional view of a further
constriction region 109 of the inlet pipe 105. The constriction
region 109 is produced by shaping a pipe wall 117 of the inlet pipe
105 in an inward manner radially in three positions using a tool.
This produces concave inward curvatures 119 on the outside of the
constriction region 109, separated by 120.degree. from one another
in a circumferential direction.
[0067] FIG. 11 shows a tool 207 for producing the inlet pipe 105,
with the constriction region 109. The tool 207 comprises three
forming inserts 209-1, 209-2, 209-3, which are pressed onto the
inlet pipe 105 by the tool 207 in a radial direction to produce the
concave inward curvatures 119. The lateral deformation of the inlet
pipe 105 produces the constriction region 109 in the interior of
the inlet pipe 105. At its tip each of the forming inserts 209-1,
209-2, 209-3 comprises three roller-shaped, spherical, extended
spherical or zeppelin-shaped shaping segments 211, which press
against the pipe wall 117 as the inward curvatures 119 are
produced.
[0068] It is thus possible simultaneously to produce three inward
curvatures by pressing a forming insert 209-1, 209-2, 209-3 once.
The internal cross section of the constriction region 109 is
defined by the inserted mandrel 200. This means that the pipe
tolerance does not influence the internal diameter of the
constriction region 109. After the forming process the mandrel 200
is removed from the formed inlet pipe.
[0069] The tool 207 produces a cross sectional change based on a
mechanical forming process, in that the forming inserts 209-1,
209-2, 209-3 are pressed using force, pressure or impact. The
shaping segments 211 are each inserted in a cutout in the forming
inserts 209-1, 209-2, 209-3.
[0070] The forming inserts 209-1, 209-2, 209-3 are guided in a
radial direction by the tool 207. The number of forming inserts is
generally not limited to three. Two or four forming inserts can be
used in the same way. The deformations produced by the tool 207
bring about noise optimization as a result of deformation at the
refrigerant pipe in the region of the injection point. Shaping or
forming operations can be performed once or a number of times one
after the other in line if required. Shaping can take place
directly on or in the injection region or other points of the inlet
pipe 105.
[0071] FIG. 12 shows a cross sectional view of the tool 207 for
producing the inlet pipe 105. The shaping segments 211 of the
radially displaceable forming inserts 209-1, 209-2, 209-3 are
formed by rollers 213, which have a semi-circular external profile
in cross section. The rollers 213 are supported in a rotatable
manner in the respective forming inserts 209-1, 209-2, 209-3. The
rollers 213 produce a corresponding inward curvature 119 during
forming.
[0072] FIG. 13 shows a shaping segment 211 formed by a roller 213.
The roller 213 comprises an opening 215, through which a pin is
pushed to fasten the roller 213 to the forming insert 209-1, 209-2,
209-3. The roller 213 is made of a hard metal for example, in order
to minimize tool wear during shaping.
[0073] FIG. 14 shows an L-shaped forming insert 209 of the tool
207, serving as a roller holder. The forming insert 209 comprises a
rectangular cutout 217, which serves for the insertion of the
rollers 213 as the shaping segment 211. The rollers 213 are
fastened by pins to the respective positions in the openings 219.
The forming insert 209 serves as a triple chuck and rail for the
rollers 213. The rollers 213 produce the corresponding inward
curvatures 119 in the pipe wall 117 as the shaping segment 211.
[0074] FIG. 15 shows views of an inlet pipe 105 produced using the
tool 207. The geometric form and shape of the tool 207 is
significant for rigidity and acoustic improvement. As a result of
the forming of the rollers 213 the inlet pipe 105 comprises
constriction regions 109 that are circular in cross section. A
chamber 111 results between two constriction regions 109
respectively.
[0075] The geometric shape of the inlet pipe 105 increases the
rigidity and bending moment. Kinks in the inlet pipe 105 or cross
sectional changes to the constriction region 109 during the
subsequent assembly process are prevented. Noise production and
acoustics are reduced. The tool 207 brings about an acoustic
improvement for mass production, an increase in rigidity in the
event of bending stress and process reliability when producing the
geometry.
[0076] The method for producing the evaporator does not damage or
impair the pipe surface of the inlet pipe 105. Leakage during the
forming process, for example due to cracks, is therefore
excluded.
[0077] All the features explained and illustrated in conjunction
with individual embodiments of the invention can be provided in
different combinations in the inventive subject matter in order to
achieve their advantageous effects simultaneously.
[0078] The scope of protection of the present invention is defined
by the claims and is not restricted by the features explained in
the description or illustrated in the figures.
LIST OF REFERENCE CHARACTERS
[0079] 100 Refrigeration appliance [0080] 103 Evaporator [0081] 105
Inlet pipe [0082] 107 Pipe region [0083] 109 Constriction region
[0084] 111 Chamber [0085] 113 Capillary tube [0086] 115 Lateral
area [0087] 117 Pipe wall [0088] 119 Inward curvature [0089] 200
Mandrel [0090] 203 Jaw elements [0091] 205 Cutout [0092] 207 Tool
[0093] 209 Forming insert [0094] 211 Shaping segment [0095] 213
Roller [0096] 215 Opening [0097] 217 Cutout [0098] 219 Opening
* * * * *